Aesop Rock
El-P
Cannibal Ox
Alias
Sole
Dose One
Sage Francis
Buck 65
Slug/ Atmosphere
Ras Kass
Chino XL
Dälek
Blackalicious
MURS
Mr. Lif
Eyedea
Illogic
Juggaknots
Jurassic 5
Odd Nosdam
Why?
Qwel
Common
Mos Def
Talib Kweli
Non Phixion
Deltron 3030
Blueprint
Copywrite
Cage

There are so many.......